BrowserWindow.cpp Example File

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 #include "BrowserWindow.h"

 #include <QtCore>
 #include <QtGui>
 #include <QPropertyAnimation>
 #include <QResizeEvent>

 #include "BrowserView.h"
 #include "HomeView.h"

 BrowserWindow::BrowserWindow()
     : m_slidingSurface(new QWidget(this))
     , m_homeView(new HomeView(m_slidingSurface))
     , m_browserView(new BrowserView(m_slidingSurface))
     , m_animation(new QPropertyAnimation(this, "slideValue"))
 {
     m_slidingSurface->setAutoFillBackground(true);

     m_homeView->resize(size());

     m_browserView->resize(size());

     connect(m_homeView, SIGNAL(addressEntered(QString)), SLOT(gotoAddress(QString)));
     connect(m_homeView, SIGNAL(urlActivated(QUrl)), SLOT(navigate(QUrl)));

     connect(m_browserView, SIGNAL(menuButtonClicked()), SLOT(showHomeView()));

     m_animation->setDuration(200);
     connect(m_animation, SIGNAL(finished()), SLOT(animationFinished()));

     setSlideValue(0.0f);
 }

 void BrowserWindow::gotoAddress(const QString &address)
 {
     m_browserView->navigate(QUrl::fromUserInput(address));
     showBrowserView();
 }

 void BrowserWindow::animationFinished()
 {
     m_animation->setDirection(QAbstractAnimation::Forward);
 }

 void BrowserWindow::navigate(const QUrl &url)
 {
     m_browserView->navigate(url);
     showBrowserView();
 }

 void BrowserWindow::setSlideValue(qreal slideRatio)
 {
     // we use a ratio to handle resize corectly
     const int pos = -qRound(slideRatio * width());
     m_slidingSurface->scroll(pos - m_homeView->x(), 0);

     if (qFuzzyCompare(slideRatio, static_cast<qreal>(1.0f))) {
         m_browserView->show();
         m_homeView->hide();
     } else if (qFuzzyCompare(slideRatio, static_cast<qreal>(0.0f))) {
         m_homeView->show();
         m_browserView->hide();
     } else {
         m_browserView->show();
         m_homeView->show();
     }
 }

 qreal BrowserWindow::slideValue() const
 {
     Q_ASSERT(m_slidingSurface->x() < width());
     return static_cast<qreal>(qAbs(m_homeView->x())) / width();
 }

 void BrowserWindow::showHomeView()
 {
     m_animation->setStartValue(slideValue());
     m_animation->setEndValue(0.0f);
     m_animation->start();
     m_homeView->setFocus();
 }

 void BrowserWindow::showBrowserView()
 {
     m_animation->setStartValue(slideValue());
     m_animation->setEndValue(1.0f);
     m_animation->start();

     m_browserView->setFocus();
 }

 void BrowserWindow::keyReleaseEvent(QKeyEvent *event)
 {
     QWidget::keyReleaseEvent(event);

     if (event->key() == Qt::Key_F3) {
         if (m_animation->state() == QAbstractAnimation::Running) {
             const QAbstractAnimation::Direction direction =  m_animation->direction() == QAbstractAnimation::Forward
                                                              ? QAbstractAnimation::Forward
                                                                  : QAbstractAnimation::Backward;
             m_animation->setDirection(direction);
         } else if (qFuzzyCompare(slideValue(), static_cast<qreal>(1.0f)))
             showHomeView();
         else
             showBrowserView();
         event->accept();
     }
 }

 void BrowserWindow::resizeEvent(QResizeEvent *event)
 {
     const QSize oldSize = event->oldSize();
     const qreal oldSlidingRatio = static_cast<qreal>(qAbs(m_homeView->x())) / oldSize.width();

     const QSize newSize = event->size();
     m_slidingSurface->resize(newSize.width() * 2, newSize.height());

     m_homeView->resize(newSize);
     m_homeView->move(0, 0);

     m_browserView->resize(newSize);
     m_browserView->move(newSize.width(), 0);

     setSlideValue(oldSlidingRatio);
 }